Rus Articles Journal

How to light the house comfortably?

Suddenly became clear that depends on quality of a lamp much. The overload of eyes causes a headache. Often we complain of constant fatigue, without suspecting that to get rid of it, it is rather correct to pick up an electric bulb. Very much can be that from - for incorrect lighting we begin to wear glasses since school years. Therefore, it is necessary to treat the choice of lamps seriously.

There is a steady opinion that the lamp is more powerful, the better it lights. It is not right. To estimate luminous efficiency of a lamp, it is necessary to divide a light stream (in lumens) into its electric power (in watts). Only this way it is possible to compare lamps of various principles of action objectively. What we will also try to make in table 1.

The variability of data is caused by what was compared by lamps of production of different firms and different power - more powerful lamps have, as a rule, higher luminous efficiency.

Table 1. Luminous efficiency of lamps of different types.

lamp Type............................................ Luminous efficiency, lm/W

Standard glow lamp......................... 7 - 17

Krypton..................................................... 8 - 19

Halogen...................................................... 14 - 30

Mercury........................................................... 40 - 60

Luminescent............................................. 40 - 90

Compact luminescent............................ 40 - 90

Sodium............................................... ....... 90 - 150

If luminous efficiency of a lamp of 50 lm/W and more, it is considered as a lamp of low energy consumption. For example, the 20 W compact luminescent lamp thanks to high luminous efficiency can quite replace 100 - the watt glow lamp at an identical svetopotok.

Until recently such lamps in life were applied quite seldom. It is clear. Then the electricity was cheap, and the knowledge-intensive lamps are expensive. Now the situation changed.

However it is not necessary to think that suitability of lamps is characterized only by luminous efficiency. It is necessary to consider also other characteristics. Important, for example, color of a subject at artificial lighting is how naturally rendered. And it, first of all, depends on own color of light radiated by a lamp. For example, you should not apply economic mercury or sodium lamps in the dwelling. Quality of reproduction of flowers by them is far from an ideal.

Color of radiation is measured in Kelvins (To). For those who thoroughly forgot physics, I will remind: 1 K it is in number equal to 1 degree Celsius and to pass from one scale into another, it is enough to take away 273 from the number of degrees Kelvin. Warmly - white color corresponds 3300 K, is neutral - white color - 3300 - 5300 To, day white color - over 5300 To, the substance warmed up to this temperature so shines.

Comfort of the room depends on the level of illumination and chromaticity of radiation of light sources. At weak lighting people feel well if they in a range of lighting prevail oranzhevo - red tone, cold it is violet - blue tone causes feeling of the condensed twilight.

In our dwelling most we accept the warm white color corresponding to the radiation of glow lamps, halogen and compact luminescent lamps with a carving socle.

Neutrally - white color of radiation creates more business mood, it is better to use it not houses, and at work, in places of study, shops and other public places.

You want to fill the house with unusual light? Then at your service a wide choice of lamps of the most different flowers and shades - red, green, golden and scintillating, as crystal.